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trasher [3.6K]
3 years ago
7

Multiply and write in standard form.(3x − 2)(5x2 – 3x + 4)​

Mathematics
1 answer:
ira [324]3 years ago
7 0

Step-by-step explanation:

(3x-2)(5x^2-3x+4)

15x^3-9x^2+12x-10x^2+6x-8

Now, combine like terms.

15x^3-19x^2+18x-8

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Step-by-step explanation:

\sqrt{x} > 8

square each side to get:

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Aleks04 [339]

Answer:

Option c:

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In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

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For this problem, we have that:

You have access to first year enrolment records and you decide to randomly sample 119 of those records. You find that 89 of those sampled went on to complete their degree. This means that n = 119, \pi = \frac{89}{119} = 0.7478.

90% confidence level

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Sample of 90 people with a sample proportion of 0.25

This means that n = 90, p = 0.25.

Confidence interval:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

0.25 \pm 1.645\sqrt{\frac{0.25*(1-0.25)}{90}}

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